RWRunnableFunction Class Reference

Handle class for functor-based, runnable objects. More...

#include <rw/thread/RWRunnableFunction.h>

Inheritance diagram for RWRunnableFunction:

Public Member Functions
	RWRunnableFunction ()
	RWRunnableFunction (const RWRunnableFunction &second)
	RWRunnableFunction (RWStaticCtor)
	~RWRunnableFunction ()
RWTFunctor< void()>	getFunctor () const
RWRunnableFunction &	operator= (const RWRunnableFunction &second)
void	setFunctor (const RWTFunctor< void()> &functor)
Public Member Functions inherited from RWRunnable
	RWRunnable ()
	RWRunnable (const RWRunnable &second)
	RWRunnable (RWStaticCtor)
	~RWRunnable ()
RWRunnable	getNestedRunnable () const
RWRunnableSelf	getRWRunnableSelf () const
RWWaitStatus	join (unsigned long milliseconds)
void	join (void)
RWRunnable &	operator= (const RWRunnable &second)
void	raise () const
void	releaseInterrupt ()
RWWaitStatus	requestCancellation ()
RWWaitStatus	requestCancellation (unsigned long milliseconds)
RWWaitStatus	requestInterrupt ()
RWWaitStatus	requestInterrupt (unsigned long milliseconds)
RWCompletionState	start ()
RWExecutionState	wait (unsigned long stateMask)
RWWaitStatus	wait (unsigned long stateMask, RWExecutionState *state, unsigned long milliseconds)
Public Member Functions inherited from RWRunnableHandle
void	addCallback (const RWTFunctor< void(const RWRunnable &, RWExecutionState)> &functor, unsigned long stateMask, RWCallbackScope scope=RW_CALL_REPEATEDLY)
RWCompletionState	getCompletionState () const
RWExecutionState	getExecutionState () const
bool	isInterruptRequested () const
bool	isSelf () const
bool	isSelf (const RWThreadId &id) const
void	removeCallback (const RWTFunctor< void(const RWRunnable &, RWExecutionState)> &functor)
RWThreadId	threadId () const
Public Member Functions inherited from RWHandleBase
bool	isValid (void) const
bool	operator!= (const RWHandleBase &second) const
bool	operator== (const RWHandleBase &second) const

Static Public Member Functions
static RWRunnableFunction	make ()
static RWRunnableFunction	make (const RWTFunctor< void()> &functor)

Additional Inherited Members
Protected Member Functions inherited from RWRunnable
	RWRunnable (const RWRunnableSelf &second)
Protected Member Functions inherited from RWRunnableHandle
	RWRunnableHandle ()
	RWRunnableHandle (const RWRunnableHandle &second)
	RWRunnableHandle (RWRunnableImp *runnableImpP)
	RWRunnableHandle (RWStaticCtor)
	~RWRunnableHandle ()
RWRunnableHandle &	operator= (const RWRunnableHandle &second)
Protected Member Functions inherited from RWHandleBase
	RWHandleBase (const RWHandleBase &second)
	RWHandleBase (RWBodyBase *body)
	RWHandleBase (RWStaticCtor)
	RWHandleBase (void)
	~RWHandleBase (void)
RWBodyBase &	body (void) const
RWHandleBase &	operator= (const RWHandleBase &second)

Detailed Description

The RWRunnableFunction class is a handle class for functor-based runnable objects.

A runnable object provides the basic mechanisms used to create, control, and monitor the threads of execution within your application. Runnables are used to define the task or activity to be performed by a thread.

Each runnable object is reference-counted; a runnable body instance keeps a count of the number of handles that currently reference it. A runnable object is deleted when the last handle that references the body is deleted.

A functor-based runnable accepts a functor object for execution. A functor is an object used to encapsulate a function call. Each functor keeps a pointer to the function and copies of the argument values that are to be passed to the function. Invoking a functor produces a call to the function.

A functor-based runnable simply redefines the basic run() member to invoke a functor instance stored within the runnable. With this capability, you do not have to resort to sub-classing or other intrusive techniques to customize the execution behavior of a runnable. The functor-based runnables allow you to dynamically specify the functions you want to execute when a runnable is started.

RWRunnableFunction is used to access a synchronous runnable, which executes the specified functor in the same thread that calls start().

Example

#include <rw/thread/RWRunnableFunction.h>
#include <rw/functor/RWTFunctor.h>
#include <rw/functor/rwBind.h>
 
void foo(int i) { std::cout << i << std::endl; }
 
int main() {
  // Create an RWRunnableFunction that calls foo.
  RWRunnableFunction runnablefunc =
      RWRunnableFunction::make(rwBind(foo, 7));
 
  runnablefunc.start();  // prints 7
 
  // Create a functor directly, passing 11 as client data.
  RWTFunctor<void()> functor = rwBind(foo, 11);
 
  // Set runnablefunc to use the new functor:
  runnablefunc.setFunctor(functor);
 
  runnablefunc.start();  // prints 11
 
  return 0;
}

Constructor & Destructor Documentation

RWRunnableFunction() [1/3]

RWRunnableFunction::RWRunnableFunction ( )

inline

Constructs an empty RWRunnableFunction handle instance.

RWRunnableFunction() [2/3]

RWRunnableFunction::RWRunnableFunction ( RWStaticCtor )

inline

Constructs a global static handle instance that may be assigned to before construction. The static constructor does not change the instance state.

RWRunnableFunction() [3/3]

RWRunnableFunction::RWRunnableFunction ( const RWRunnableFunction & second )

inline

Binds a new handle to the runnable instance, if any, pointed to by the handle second.

~RWRunnableFunction()

RWRunnableFunction::~RWRunnableFunction ( )

inline

Destructor.

Member Function Documentation

getFunctor()

RWTFunctor< void()> RWRunnableFunction::getFunctor

(

)

const

Gets the current functor instance, if any, associated with the runnable. Possible exceptions include RWTHRInvalidPointer and RWTHRInternalError.

make() [1/2]

static RWRunnableFunction RWRunnableFunction::make ( )

static

Constructs and returns an RWRunnableFunction object with an undefined functor. The setFunctor() member must be used to define a functor prior to starting.

make() [2/2]

static RWRunnableFunction RWRunnableFunction::make ( const RWTFunctor< void()> & functor )

static

Constructs and returns an RWRunnableFunction that executes the specified functor when started.

operator=()

RWRunnableFunction & RWRunnableFunction::operator= ( const RWRunnableFunction & second )

inline

Binds this to the runnable instance, if any, pointed to by the handle second.

setFunctor()

void RWRunnableFunction::setFunctor

(

const RWTFunctor< void()> &

functor

)

Sets the functor to be executed by this runnable. Possible exceptions include RWTHRInvalidPointer and RWTHRInternalError.